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观测卡特拉鱼的形态特征和1—3龄鱼主要可量性状及其比例的变动。1—3龄鱼除主食商品饲料外,同时也食较大比例的浮游生物。着重对浮游生物的种类和比例进行了分析。肠长与体长呈直线相关。Y=6.38X-89.95。1—4龄鱼体长和体重相对生长率和生长指标都随年龄增加而逐渐下降。体长与体重呈曲线相关。W=0.00002261L~(3.0569)。采用 Von.Bertalanffy 生长方程分析其生长特性。方程参数 L_∞=821.2mm,W_∞=19616.6g,t_0=0.6年,K=0.3。体长生长不具拐点,生长速度随年龄增加而递减;体重生长具拐点,其值4.3年。此时体重生长速度达最大值。4、3龄前是生长旺盛期,此后进入生长缓慢期。
Morphological characteristics of Cutrafish and the main measurable traits and their proportions of 1-3-day-old fish were observed. 1-3 fish in addition to staple food, but also eat a larger proportion of plankton. The types and proportions of plankton are emphatically analyzed. Intestinal length and body length were linear. Y = 6.38X-89.95.1. The relative growth rate and growth index of body length and body weight decreased gradually with age. Body length and weight were curve-related. W = 0.00002261L ~ (3.0569). Growth characteristics were analyzed using the Von.Bertalanffy growth equation. Equation parameters L_∞ = 821.2mm, W_∞ = 19616.6g, t_0 = 0.6 years, K = 0.3. Body length growth does not inflection point, the growth rate decreases with age; weight growth with inflection point, the value of 4.3 years. Weight growth rate at this time the maximum. 4,3 before the age of vigorous growth, then into the slow growth phase.